Bongs are great! I do bongs at home. A small acryllic may work for traveling, but make sure no one can see you smoke.
Joints are best for travel. They are not that wasteful if you roll em right. A good tight roll (not so tight you can't smoke em of course) works wonders. I have rolled em where that can last 10 to 15 minutes. If you can'troll tight cigarette machines will help out.
Wired paper is great for passing weed in tight places and you can smoke it all. Gives a whole new meaning to the term "right down to the wire".